A simple optimal balance control scheme for electrolyzation plants is proposed. It can be realized through the use of a commercially available model predictive control (MPC) package. In most cases, in order to calculate the optimal operating conditions for energy conservation, much property data or information regarding disturbances, such as the deterioration of electrodes and ion exchange membranes, is necessary. However, the proposed controller can achieve the optimal conditions without them. In this paper, it is proven that the resultant converged operating conditions of the proposed controller are identical to the actual optimal conditions.